128894556 has 48 divisors (see below), whose sum is σ = 361813760. Its totient is φ = 34888320.

The previous prime is 128894551. The next prime is 128894573. The reversal of 128894556 is 655498821.

It is a super-2 number, since 2×128894556² = 33227613132874272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128894551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38785 + ... + 41976.

Almost surely, 2^128894556 is an apocalyptic number.

It is an amenable number.

128894556 is an abundant number, since it is smaller than the sum of its proper divisors (232919204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128894556 is a wasteful number, since it uses less digits than its factorization.

128894556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80794 (or 80792 counting only the distinct ones).

The product of its digits is 691200, while the sum is 48.

The square root of 128894556 is about 11353.1738293748. The cubic root of 128894556 is about 505.1397267184.

The spelling of 128894556 in words is "one hundred twenty-eight million, eight hundred ninety-four thousand, five hundred fifty-six".